某些物质(如钾离子、钠离子)以细胞膜特异载体蛋白携带下,通过细胞膜本身的某种耗能过程,逆浓度差或逆电位差的跨膜转运称为主动转运。主动转运的特点是:必须借助于载体、逆浓度差或电位差转运并需要能量。
主动转运(active transport):一种转运方式,通过该方式溶质特异的结合于一个转运蛋白上然后被转运过膜,与被动转运运输方式相反,主动转运是逆着浓度梯度下...
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...谢产生的能量将物质(通常是带电离子)逆浓度梯度或电位梯度进行跨膜转运的过程,称为原发性主动转运(primary active transport);是人体最重要的物质转运形式。
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继发性主动转运 secondary active transport ; second active transport ; secondary transport
次级主动转运 secondary active transport
原发主动转运 primary active transport
程叫原初主动转运 primary active transport
继发主动转运 secondary active transport
主动运转 Add to Auto ; motor vehiclerun ; Active transport
主回转运动 circular mainmotion ; circular main movement ; circular main
回转主运动 Rotating Main Motion ; rotating main movement
也称原初主动运转 primary active transport
主动转运这种转运过程的特征是选择性和饱和性,需要细胞的能量消耗。
Active transport: This process is characterized by selectivity and saturability and requires energy expenditure by the cell.
氯化物大多通过近端小管被动吸收,但它在TALH和DCT中主动转运。
Chloride is passively absorbed along most of the proximal tubule but is actively transported in the TALH and the DCT.
药物可通过被动扩散、易化被动扩散、主动转运或胞饮作用等方式穿越生物屏障。
Drugs may cross a biologic barrier by passive diffusion, facilitated passive diffusion, active transport, or pinocytosis.
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